13 cards rummy is the most played rummy game in India, famously known as Indian Rummy. It's an offshoot of the Gin Rummy variation. Every player is given 13 cards, they must group cards into sequences and sets by picking and discarding them. While playing 13 cards rummy Joker card can be used as a substitute for other cards. To declare a winner, the player should create 3 or more pure or impure sequences.